高体积分数SiCp/Al复合材料的制备与阳极氧化

Preparation and Anodizing of SiCp/Al Composites with Relatively High Fraction of SiCp.

作者信息

Wang Bin, Qu Shengguan, Li Xiaoqiang

机构信息

Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials, South China University of Technology, Guangzhou 510640, China.

National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China.

出版信息

Scanning. 2018 Feb 26;2018:8945729. doi: 10.1155/2018/8945729. eCollection 2018.

DOI:10.1155/2018/8945729

PMID:29682145

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5846377/

Abstract

By properly proportioned SiC particles with different sizes and using squeeze infiltration process, SiCp/Al composites with high volume fraction of SiC content (Vp = 60.0%, 61.2%, 63.5%, 67.4%, and 68.0%) were achieved for optical application. The flexural strength of the prepared SiC/Al composites was higher than 483 MPa and the elastic modulus was increased from 174.2 to 206.2 GPa. With an increase in SiC volume fraction, the flexural strength and Poisson's ratio decreased with the increase in elastic modulus. After the anodic oxidation treatment, an oxidation film with porous structure was prepared on the surface of the composite and the oxidation film was uniformly distributed. The anodic oxide growth rate of composite decreased with SiC content increased and linearly increased with anodizing time.

摘要

通过合理配比不同尺寸的碳化硅颗粒并采用挤压浸渗工艺，制备出了用于光学应用的碳化硅体积分数较高（Vp = 60.0%、61.2%、63.5%、67.4%和68.0%）的碳化硅颗粒增强铝基复合材料。所制备的碳化硅/铝复合材料的抗弯强度高于483兆帕，弹性模量从174.2吉帕提高到206.2吉帕。随着碳化硅体积分数的增加，抗弯强度和泊松比随弹性模量的增加而降低。经过阳极氧化处理后，在复合材料表面制备出了具有多孔结构的氧化膜，且氧化膜分布均匀。复合材料的阳极氧化膜生长速率随碳化硅含量的增加而降低，随阳极氧化时间呈线性增加。